package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.time.LocalDateTime;

/**
 * 实现自动填充公共字段的切面类
 *
 * @author Moozy 2025/4/15 20:10
 **/
@Aspect
@Component
@Slf4j
public class AutoFillAspect {

    /**
     * 切入点
     */
    @Pointcut("execution(* com.sky.mapper.*.*(..)) && " +
            "@annotation(com.sky.annotation.AutoFill)")
    public void autoFillPointcut() {
    }

    /**
     * 前置通知，填充公共字段
     */
    @Before("autoFillPointcut()")
    public void autoFill(JoinPoint joinPoint) {
        log.info("自动填充公共字段");

        // 获取当前操作类型 UPDATE/INSERT
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();
        AutoFill autoFill = signature.getMethod().getAnnotation(AutoFill.class);
        OperationType operationType = autoFill.value();

        // 获取方法参数
        Object[] args = joinPoint.getArgs();
        if (args == null || args.length == 0) {
            return;
        }
        // 获取第一个参数
        Object entity = args[0];

        // 填充公共字段
        LocalDateTime now = LocalDateTime.now();
        Long currentUserId = BaseContext.getCurrentId();
        // INSERT 额外添加 创建时间和创建人
        if (OperationType.INSERT == operationType) {
            try {
                Method setCreateTime = entity.getClass()
                        .getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
                Method setCreateUser = entity.getClass()
                        .getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);

                setCreateTime.invoke(entity, now);
                setCreateUser.invoke(entity, currentUserId);
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }
        // UPDATE
        try {
            Method setUpdateTime = entity.getClass()
                    .getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
            Method setUpdateUser = entity.getClass()
                    .getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);

            setUpdateTime.invoke(entity, now);
            setUpdateUser.invoke(entity, currentUserId);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }

    }

}
